Diaphragm pump



Sept. 14 1926.

C. F. KETTERING El' AL DIAPHRAGM PUMP Filed S'ept. 26, 1923 Patented Sept. 14, 1926.

UNITED STATES PATENT OFFICE. Y

CHARLES F. KETTERING AND GEORGE A. BUVINGER, OF DAYTON, OHIO, ASSIGNORS TO DELQO-LIGHT COMPANY, F DAYTON, OHIO, A CORPORATION OF DELAWARE.

DIAPHRAGM PUMP.

This invention relates to pumping apparatus and more particularly to pumps of the suction type, wherein a motor actuated diaphragm' is employed for creating a vacuum in the suction chamber of the pump and for forcing the fluid from the pump into suitable service pipes or elsewhere.

' It is among the objects of the present invention to provide pumping-apparatus of the above named type 'that will be simple and reliable and which will tend toward reduction in the number of parts. y

Other and further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings, wherein a preferred embodiment of one form lof the present invention is clearly shown.

, Fig. 1 is a view, partly in section and partly in4 elevation of the pumping apparatus embodying the present invention.

Fig. 2 is a fragmentary sectional view taken on the line 2-2 of Fig. 1.

Referring to the drawing, a gear casing is provided with a suitable supporting base 21, and supports from one wall thereof an electric motor 22. Motor shaft 23 extends into the gear casing 20 and is jourl nalled in bearings 24 and 25 supported by opposite walls of casing 20. A worm 26 is provided on motor shaft 23 substantially centrally of the casing ,20. A combined lubricant filler and drain cock 27 registersy with an opening 28 adjacent the base of the casing 20. Casing 20 is provided with a flange 30 which supports a flanged frame member 31 havin beveled edge 31h. Frame 31 includes a p ate 32 which supports a guide bearing 33 substantially centrally within the casing 20, a vent 31a is provided in the wall of frame 31. Located between the frame 31 and flanged valve head 35 are two diaphragms 36 and 37 of any suitable material such for example as a composition of rubber and cloth separated from each other by a spacin ring 38 provided with a beveled inner e ge 39. Bolts 40 which pass through flange 30, frame 31, diaphragm 37, spacing ring 38, diaphragm 36 and valve head 35, hold these/parts in assembled relation and tend to make the suction chamber 41 air tight. The valve head 35 is provided threaded at 48. A spacer 50, having beveled edge 51, is provided with a central opening for receiving the reduced portion 46, and is adapted to rest upon the shoulder 47, and bear against the lower face of' diaphragm 37. Spacer 52, having a rounded edge 53 is provided with a central opening through which the reduced portion 46 passes, and is adapted to bear against the upper face of diaphragm 37 and the lower face of diaphragm 36. Nut 54 having a beveled edge 55, is provided with a central opening which is tapped for engagement with the threaded portion 48 of connecting rod 45. Through means of wrench holes 56 and 57 the nut 54 may be drawn upon the connecting rod 45, thus bringing the intermediate portion of diaphragm 36 and 37 into close contact with the spacer 52 so that the two diaphragms may be operated in unison. The purpose of providing the .parts 50, 52 and 54 with beveled edges 51, 53 and 55 respectively, andy beveled edges 31b and 35"1 on frame 31 and valve head 35 respectively is to reduce the liability of breakage of the diaphragms 36 and 37 upon being iiexed. v

The casing 2O is provided with apertured bosses 60 and 61 `in opposite walls thereof,

providing alined openings 60'r1 and 61a respectively disposed at right angles to the axis ofthe motor shaft 23, and which are adapted to receive bearings on shoulder members 62 and 63 respectively. These shoulders are counterbored as at 64 and 65 respectively and are provided with reduced threaded end portions 66 and 67. Shoulder 62 is secured against rotary movement with respect to casing 20 by a key 68 carried by casing 2() and which engages a key-way 69 cut in bearing 62. End coverer nuts 70 and 71, provided with `tapped recesses 72" and 73 respectively, for receiving the threaded ends 66 and 67 respectively of shoulders 62 and 63 respectively, outer surface of casin Therefore in order to e ment of the bearings 62 necessary is to remove revolve the e desired amou 75. received b shoulders 62 a is secured to bearin at its opposite end i 78 which recei ing 63. Thus against rotar secured to bearin the bearing 6 rotary movem 79 with the not Located between mounted on shaft gear 80 cooperating with an elongated grally therewith an tric strap 83 is atta and is provided wi gue portion 85 of lng ton 45. A pin 86 connects flow from the sourc 90, through inlet val suction chamber 41, outlet valve 43 is cl stroke of connectin within the suction to open outlet valv connected with a or elsewhere.

long as the In gearing within t iciently lubricat gear 8,0 is runn well as the eccentric 83. Sufiicient oil will 26 by gear 80, and t cant will lubricate th A decided advant of more than one d one diaphragm be ing mechanism wi nd covers or nuts or s provided with ves a pin 79 carried since the bearing 62 y movement d in positio he operation of the will be as follows:

When the motor 22 is o tating the motor sh drive the worm which through rocate the conn ing 33. rocated the di gear 80 and ec eccentric stra ecting rod 4 s the connectin g rod 45, the

chamber 4l W he casing 2 82 and eccent be carried to are secured to the pump will continue to function as long as 20 by screws ect endwise adjust- The feature of adjusting the shoulders and 63, all that is 62 and 63 endwise with respect to the casthe screws and, ing 20, makes it a very simple matter to ad- 71 the just the7 worm gear 8O with respect to the nt and then replace the screws worm 26 in order to take up lost motion. pposite ends of 'the shaft 76 are The shaft 76 and shoulders 62 and 63 may he counterbores 64 and 65 in also be easily removed through the alined pectively. Shaft 76 openings 60a and 61a, after the covers 70 g 62 by a pin 77, and and 71 have been removed.

a notch While the form of mechanism herein by bearshown and described constitutes a preferred is locked embodiment of one form of invention, it the shaft 76 is is to be understood that other forms might g 62, it will follow that be adopted and various changes and altera- 3 will also be held against tions made in the shape, size, and proporgagemellt 0f pill tion of the elements therein without depart- 75. the remalning diaphragm remains intact.

ing from the spirit and scope of the invenbearings 62 and 63 and tion. 76 as its axis is a worm We claimwith worm 26 provided 1. A. pump comprising, in combination, hub 81, forming intea frame member provided with a flange haveccentric 82. An eccening its inner edge beveled; a valve head for ched to the eccentric 82 said frame member, said valve head having slot 84 for receiva flange provided with a beveled inner edge; the CODIleCting IOd a spacer ring between the valve he'ad and the eccentric Strap the ,frame member, said spacer ring being the connecting rod of wedge-shaped cross section so as to have n by .cotter pin 87. the converging surfaces at its inner edge; pumping apparatus a mechanically-operated reciprocating member in the frame member, including dia-A perated, thus rophragms transversely mounted thereon in aft 23, the worm 26 will spaced relation, the outer portion of the one centric 82, diaphragm being interposed between the p 83 will recipframe member and spacer ring and the other 5 in guide beardiaphragm between the spacer ring and g rod 45 is recipvalve head; and means for tightly clamping gms 36 and 37 will be together the valve head, spacer ring, frame ownward stroke of conmember and the diaphragme therebetween. acuum will be created in 2. A pump comprising, in combination, a r 41, whereby Huid will frame member including a guide bearing; of supply through port a mechanically-operated reciprocating memve 42, duct 44 into the ber arranged in said guide bearing and induring which time the cluding a reduced end portion forming a osed. On the upward shoulder on said member; a supporting disc pressure mounted on the reduced portion of the reill tend ciprocating member and engaging with the e 43 and valve 42 will shoulder thereon, said disc having its edge 1d iowing through valve beveled on the side opposite said shoulder; gh port 91 which may be a diaphragm of greater diameter than the ny suitable service pipes disc surrounding the reduced portion of the 1s operation will continue reciprocating member and superposed on the otor 22 is operated. The dlsc; a spacer ring surrounding said re- 0 will be sufduced portion and superposed on the diaed inasmuch as the worm phragm, said ring being of substantially the continuously in oil, as same diameter as the supporting disc and ric strap having a rounded, convex edge; a diathe worm phragm similar to the first-mentioned diaplashing of lubriphragm superposed on the spacer ring; a e bearing 33. age is secured in the use the second diaphragm so that the beveled iaphragm, in that should ,edge is adjacent the diaphragm, and having come broken, the operatscrew-threaded engagement with the rellpnot be flooded and the duced portion of the reciprocating member v adjacent the end thereof; a velve-hed; 'a phragms and spacing ring between the valve -spaoing ring between the valve head, sald head and frame member.

rlng being wedge-shaped in cross section In testimony whereof we hereto aiiix our 10 so that the converging surfaces are at the signatures. 5 inner edge thereof, and being interposed between the outer portions of the diaphragm; CHARLES F. KETTERING. and means for tightly clamping the dia- GEORGE A. BUVINGER. 

